The 'Spirit of British Columbia' returned to service on June 6, 2018, after being converted to operate on natural gas. It was the first of two vessels to be converted to natural gas. The S'pirit of Vancouver Island' will be upgraded from fall 2018 to spring 2019. BC Ferries expected to reduce CO2 emissions by 12,500 tonnes annually by using natural gas to fuel the two Spirit Class vessels. Fuel costs for the ships were also expected to go down. The 'Spirit of British Columbia' was the first vessel in the world to refuel liquefied natural gas via delivery on a fully enclosed vehicle deck. The new Salish Class vessels introduced last year were the first in the world to fuel liquefied natural gas on an open vehicle deck via delivery truck. The natural gas is provided by FortisBC and BC Ferries saved customers more than $100 million in infrastructure costs.